LibWeb: Replace GlobalObject with Realm in wrapper functions

Similar to create() in LibJS, wrap() et al. are on a low enough level to
warrant passing a Realm directly instead of relying on the current realm
from the VM, as a wrapper may need to be allocated while no JS is being
executed.

Userland/Libraries/LibWeb/HTML/MessagePort.cpp

@@ -84,9 +84,9 @@ void MessagePort::post_message(JS::Value message)
     }));
 }
 
-JS::Object* MessagePort::create_wrapper(JS::GlobalObject& global_object)
+JS::Object* MessagePort::create_wrapper(JS::Realm& realm)
 {
-    return wrap(global_object, *this);
+    return wrap(realm, *this);
 }
 
 void MessagePort::start()